Benzyne Formation and the Diels-Alder Reaction Preparation of 1,2,3,4 Tetraphenylnaphthalene Aubree Edwards Purpose: 1,2,3,4-tetraphenylnaphthalene is prepared by first producing benzyne via the unstable diazonium salt. Then tetraphenylcyclopentadienone and benzyne undergo a diels-alder reaction to create 1,2,3,4-tetraphenylnaphthalene. Reactions: Procedure: The reaction mixture was created. Tetraphenylcyclopentadienone (0.1197g, 0.3113 mmol) a black solid powder, anthranilic acid ( 0.0482g, 0.3516 mmol) a yellowish sand, and 1,2-dimethoxyethane (1.2 ml) was added to a 5-ml conical vial.
Cadet Eric Wiggins Date: 18 September 2014 Course Name: Chem 100 Instructor: Captain Zuniga Section: M3A Identification of a Copper Mineral Intro Minerals are elements or compounds that are created in the Earth by geological processes. The method of isolating metals in a compound mineral is normally conducted through two processes.
The lab started off by measuring critical materials for the lab: the mass of an an empty 100 mL beaker, mass of beaker and copper chloride together(52.30 g), and the mass of three iron nails(2.73 g). The goal of this experiment is to determine the number of moles of copper and iron that would be produced in the reaction of iron and copper(II) chloride, the ratio of moles of iron to moles of copper, and the percent yield of copper produced. 2.00 grams of copper(II) chloride was added in the beaker to mix with 15 mL of distilled water. Then, three dry nails are placed in the copper(II) chloride solution for approximately 25 minutes. The three nails have to be scraped clean by sandpaper to make the surface of the nail shiny; if the nails are not clean, then some unknown substances might accidentally mix into the reaction and cause variations of the result.
Absorption Absorption of chlorpyrifos varies with species to species. In humans, about 70% was absorbed after oral exposure of volunteers. For the metabolite, 3, 5, 6-trichloro-2-pyridinol (TCPY), the minimal dermal absorption was 1-3%. It is to be noted that chlorpyrifos (cpf) is rapidly absorbed and transported to the brain through oral dosing [66]. Distribution
For the Chemistry unknown lab, we were given unknown letter D. We decided the best way to approach the lab was to first determine whether our unknown is an acid, base, or salt. To figure this out, we made a decision to run a ph test. When our unknown was placed on the ph paper, the ph paper turned red which indicated it had a ph of 2. This ph meant our unknown was an acid.
From the experiment, the amounts of chlorpyrifos for three samples were identified. Based on the peaks, the retention times of the samples were between 6.711 until 6.714 minutes. The sample amount of standard was 30ppm. The response factor of the standard sample amount calculated for the standard sample was 11202 Hz s-1/s.
Extra facts Written equation for methanol is; ethanol + oxygen carbon dioxide + water When fuels are combusted in an excess of oxygen they have ungone complete combustion When fuels are combusted in a limited amount of oxygen they are said to have undergone incomplete combustion Cobalt chloride paper goes blue to pink if H2O is present Limewater goes cloudy when CO2 is present When balancing equations make sure you balance in this following order; C atoms, H atoms and O atoms (Carbons, Hydrogens, Oxygens) A balanced equation of methane: CH4 + 2O2 ---> CO2 + 2H2O A balanced equation for propane: C4H8 + 5O2 ---> 4H2O + 3CO2
Results and discussion In this research, a diene (tetraphenylcyclopentadienone) was reacted with three alkyne dienophiles (acetylene dicarboxylate, diphenyl acetylene, and benzyne) to form tetraphenylphtalate, hexaphenylbenzene, and tetraphenylnaphthalene respectively. On the other hand, the diene(anthracene) was reacted with the dienophile(benzyne) to form triptycene. In the first reaction, diene (tetraphenylcyclopentadienone) interacted with the dienophile(acetylene dicarboxylate) to produce tetraphenyl phthalate as shown in the reaction mechanism 1.
The Purpese of this unit is to preduce aromatic rich naphtha. Also, it to preduct aromizate to recovery unit. Figure 17:(BFD of Aromizing unit ) Main section: Figure 18:(BFD of aromizing section )
As a result, the number of carbons in a straight chain alkane increases, alkanes become less flammable.[5] Alkane’s volatility decreases with the increase of the number of carbons in the chain. Volatility refers to the ability of a liquid to change into a vapour state which is the state that substances burn in.[6] Propane’s Properties . Being odourless and colourless, propane follows the chemical properties of an alkane. The chemical properties of propane are directly linked to its structure and intermolecular forces.
Introduction: When we breathe, we extract oxygen from the air, and use that oxygen for metabolism, which is how we convert the food we eat into useable energy to do the things that we do. One of the by-products of metabolism is carbon dioxide; whenever we exhale, we are getting rid of the carbon dioxide that our bodies produce. The main purpose of breathing, therefore, is to provide our bodies with oxygen, and rid our bodies of carbon dioxide. We humans are terrestrial (land-dwelling) mammals, and as such, our lungs are designed to breathe gas. Therefore, the first problem we must overcome to explore the underwater realm is a means to provide breathing gas.
There is strong covalent bonds between these atoms but weak Van der waals force (dipole-dipole force) between Polypropylene molecules. Isotactic Polypropylene forms a somewhat tetrahedral arrangement and its molecules are asymmetrical. These molecules form a long polymer chain.
In this experiment, different properties of stereoisomers, specifically enantiomers and diastereomers, were analyzed. R-Carvone and S-Carvone, which are enantiomers, were analyzed for opposite plane polarization and different odor. An isomerization was performed on dimethyl maleate to convert it into dimethyl fumarate, a diastereomer. Isomers are compounds with the same empirical formula, but with different arrangements of the elements.
Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, research of definitions of each relating led to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound forms when two or more nonmetal atoms share valence electrons; covalent compounds are also
Abstract The unknown concentration of benzoic acid used when titrated with standardized 0.1031M NaOH and the solubility was calculated at two different temperatures (20◦C and 30◦C). With the aid of the Van’t Hoff equation, the enthalpy of solution of benzoic acid at those temperatures was determined as 10.82 KJ. This compares well with the value of 10.27KJ found in the literature.
